Hi , thanks for the answer…I’ve managed to have some vol lights (both directional and spot light) but they are working no matter if i shut off Nvidia vol lightning, so i suppose i’m using the ue4 ones, its own integrated solution (which i’m not understanding if it’s a totally different technology or is it simply the nvdia one which has been integrated) …I’ll try to find the demo maps from Nvidia as you sayd, have you any links to provide at hand? 4.17.2 is your last up-to-date stable version with complete gameware addictions is that right? Thank you very much for sharing your work!